n fluorescent dye, or pigment which absorbs UV radiation and re-emits light of a violet or bluish hue. Used to increase the luminance factor and to remove the yellowish of white or off-white materials. (Bart J (2005) Additives in polymers: industrial analysis and applications. Wiley, New York).
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Gooch, J.W. (2011). Brightener, Optical. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_1577
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